Off and on, as search words occurred to me, I tried Google's Advanced Patent Search page --
https://patents.google.com/advanced -- which provides a simple user interface to confine searches to a specific date range, for instance -- 1907-05-01 to 1907-05-30 .
Looking over the Qualitone, about the only unique features I saw were the center-crank flywheel turntable, and the sound box. For the date ranges, I came up with nothing similar. I also searched for other patents involving sound reproduction in general -- talking machines, gramophones, phonographs, sound boxes, reproducers, etc. -- again, nothing.
So, instead of something related specifically to talking machines/phonographs/gramophones, I'm wondering if the patents apply to the tin-making (manufacturing) process, itself, or something related. For instance, just as an example, I found a patent covering the "Process of tinning or coating metal sheets" --
https://patents.google.com/patent/US854 ... n:19070501 which was published 5/21/1907.
OrthoFan